A Carnot refrigerator operates between 300.3 K and 273 K. The fraction of cooling effect required as work input is
A.20%
B.10%
C.50%
D.Not possible to find with the data
Category: Mechanical Engineering Mcqs
Total sulphur content in a diesel fuel oil must not exceed
A.1%
B.0.50%
C.0.10%
D.0.05%
E.0.01%
Which one of the following is known as trarmel?
A.A pair of steel legs joined by a screw and nut
B.A steel bar and two sliding legs which can be adjusted
C.A divider with a spring
D.None of the above
In a nozzle if back pressure is equal to inlet pressure
A.no flow occurs
B.maximum flow occurs
C.flow is subsonic in diverging section
D.flow is supersonic in converging as well as supersonic sections
Normally the colour of exhaust from a diesel engine is
A.black
B.white
C.yellow
D.reddish
The handling capacity of a drag line having bucket of one cubic metre capacity is expected to be least while handling
A.Clay, wet sticky
B.Clay, hard tough
C.Sand
D.Gravel.
A relay for protective system should have
A.High speed operation
B.High sensitivity
C.Selectivity
D.Reliability
E.All of the above
A chimney is not a part of which of the following type of power plant?
A.Steam power plant
B.Diesel engine power plant
C.Gas turbine power plant
D.Hydro-electric power plant
E.All of the above
In case of involute gears
A.Interference is inherently absent
B.A convex flank is always in contact with concave flank
C.Variation in centre distance of shafts increases radial force
D.Pressure angle is constant throughout the teeth engagement
E.None of the above
